- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄24837 > 935196020112 (NXP SEMICONDUCTORS) DATACOM, INTERFACE CIRCUIT, PDSO8 PDF資料下載
參數(shù)資料
| 型號： | 935196020112 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 網(wǎng)絡(luò)接口 |
| 英文描述： | DATACOM, INTERFACE CIRCUIT, PDSO8 |
| 封裝： | 3.90 MM, PLASTIC, MS-012, SOT96-1, SOP-8 |
| 文件頁數(shù)： | 19/24頁 |
| 文件大?。?/td> | 214K |
| 代理商： | 935196020112 |
2000 Jan 13
4
Philips Semiconductors
Product specication
CAN transceiver for 24 V systems
PCA82C251
FUNCTIONAL DESCRIPTION
The PCA82C251 is the interface between the CAN
protocol controller and the physical bus. It is primarily
intended for applications up to 1 Mbaud in trucks and
buses. The device provides differential transmit capability
to the bus and differential receive capability to the CAN
controller. It is fully compatible with the
“ISO 11898-24 V”
standard.
A current limiting circuit protects the transmitter output
stage against short-circuit to positive and negative battery
voltage. Although the power dissipation is increased
during this fault condition, this feature will prevent
destruction of the transmitter output stage.
If the junction temperature exceeds a value of
approximately 160
°C, the limiting current of both
transmitter outputs is decreased. Because the transmitter
is responsible for the major part of the power dissipation,
this will result in a reduced power dissipation and hence a
lower chip temperature. All other parts of the IC will remain
operating. The thermal protection is particularly needed
when a bus line is short-circuited.
The CANH and CANL lines are also protected against
electrical transients which may occur in an automotive
environment.
Pin 8 (Rs) allows three different modes of operation to be
selected: high-speed, slope control or standby.
For high-speed operation, the transmitter output
transistors are simply switched on and off as fast as
possible. In this mode, no measures are taken to limit the
rise and fall slope. Use of a shielded cable is
recommended to avoid RFI problems. The high-speed
mode is selected by connecting pin 8 to ground.
The slope control mode allows the use of an unshielded
twisted pair or a parallel pair of wires as bus lines.
To reduce RFI, the rise and fall slope should be limited.
The rise and fall slope can be programmed with a resistor
connected from pin 8 to ground. The slope is proportional
to the current output at pin 8.
If a HIGH level is applied to pin 8, the circuit enters a low
current standby mode. In this mode, the transmitter is
switched off and the receiver is switched to a low current.
If dominant bits are detected (differential bus voltage
>0.9 V), RXD will be switched to a LOW level.
The microcontroller should react to this condition by
switching the transceiver back to normal operation
(via pin 8). Because the receiver is slower in standby
mode, the first message will be lost at higher bit rates.
Table 1
Truth table of the CAN transceiver
Notes
1. X = don’t care.
2. If another bus node is transmitting a dominant bit, then RXD is logic 0.
Table 2
Pin Rs summary
VCC
TXD
CANH
CANL
BUS STATE
RXD
4.5 to 5.5 V
0
HIGH
LOW
dominant
0
4.5 to 5.5 V
1 (or oating)
oating
recessive
1(2)
4.5<VCC < 5.5 V
X(1)
oating if
VRs > 0.75VCC
oating if
VRs > 0.75VCC
oating
1(2)
0<VCC < 4.5 V
oating
X(1)
CONDITION FORCED AT PIN Rs
MODE
RESULTING VOLTAGE OR CURRENT AT PIN Rs
VRs > 0.75VCC
standby
IRs <10 A
10
A< IRs < 200 A
slope control
0.4VCC <VRs < 0.6VCC
VRs < 0.3VCC
high-speed
IRs < 500 A
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 935196020118 | DATACOM, INTERFACE CIRCUIT, PDSO8 |
| 935216230112 | DATACOM, INTERFACE CIRCUIT, PDIP8 |
| 93600-300.00M | QUARTZ CRYSTAL RESONATOR, 300 MHz |
| 9360090 | POSITION, ROTARY SENSOR-HALL EFFECT, -45-45deg, 0.9% |
| 9363-0-15-15-35-14-10-0 | BERYLLIUM COPPER ALLOY, GOLD FINISH, PCB TERMINAL |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 9351MC2-BKV | 制造商:BEVCO Ergonomic Seating 功能描述:DELUXE CLEANROOM TASK STOOL ON GLIDES W/FOOTRING, Approval Categories:Certified 制造商:BEVCO Ergonomic Seating 功能描述:DELUXE CLEANROOM TASK STOOL ON GLIDES W/FOOTRING, Body Material:Vinyl Seat & Back, Foam Padding, Polyproplene Backshell, Aluminum Base, Color:Black, For Use With:Bevco A5 Adjustable Armrests & 3850S/5 Dual-Wheel Hard-Floor Casters , RoHS Compliant: NA |
| 9351MC2-BLV | 制造商:BEVCO Ergonomic Seating 功能描述:DELUXE CLEANROOM TASK STOOL ON GLIDES W/FOOTRING, Body Material:Vinyl Seat & Back, Foam Padding, Polyproplene Backshell, Aluminum Base, Color:Royal Blue, Series:9000, Size:Seat: 20"W x 18"D x 3"H, Back: 17.5"W x 16"H x 3"D , RoHS Compliant: NA |
| 9351ME-CH | 制造商:BEVCO Ergonomic Seating 功能描述:DELUXE ESD TASK STOOL ON GLIDES W/FOOTRING, Body Material:ESD Fabric Seat & Back, Foam Padding, ESD Polyproplene Backshell, Aluminum Base, Color:Charcoal, Series:9000, Size:Seat: 20"W x 18"D x 3"H, Back: 17.5"W x 16"H x 3"D , RoHS Compliant: NA |
| 9351ME-NY | 制造商:BEVCO Ergonomic Seating 功能描述:DELUXE ESD TASK STOOL ON GLIDES W/FOOTRING, Approval Categories:Exceeds ANSI/BIF 制造商:BEVCO Ergonomic Seating 功能描述:DELUXE ESD TASK STOOL ON GLIDES W/FOOTRING, Body Material:ESD Fabric Seat & Back, Foam Padding, ESD Polyproplene Backshell, Aluminum Base, Color:Navy Blue, Series:9000, Size:Seat: 20"W x 18"D x 3"H, Back: 17.5"W x 16"H x 3"D , RoHS Compliant: NA |
| 9352 | 功能描述:螺絲和緊固件 1" 10-32 NYLON PAN RoHS:否 制造商:Unspecified 產(chǎn)品: 類型:Washer 螺紋大小: 長度: 材料:Steel 電鍍:Nickel 螺絲頭: 螺絲類型: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。